Selenite is a healing and cleansing crystal which makes it very useful for third chakra balancing.
If you are feeling stressed or anxious, hold this Selenite crystal against your solar plexus while you take deep breaths.
Selenite in the wand format here is also good for cleansing auras. Just take the wand and pass it around your energy field, passing through the space in front of your head, front body, back and down to your feet. Allow yourself to sit in your space afterwards and feel your energy shift into a more harmonious vibration.